If you are talking about the pericardium sac it is a 2 layered fluid filled sac that surrounds the heart to protect it
Answer:
Well-baby examinations.
Explanation:
Well-baby exams are a type of medical checkup used to monitor the growth and physical development of children. This type of examination is done regularly, as children's bodies are constantly developing and growing. These tests evaluate the child from head to toe, observing height, weight, relationship between limb height, child's perception, head shape, body balance, movement, among other things that provide a diagnosis of the whole body of the child.
Why are they helpful? So you don't have to mail a letter and wait THREE WEEKS FOR YOUR FRIEND TO WRITE BACK. So you don't have to send a whole formal email when you want to invite your bf to an event. You could just text:
Hey wanna come to a party on thurs:)
SO YOU DON"T HAVE TO CALL ON THE PHONE ALL THE TIME THAT IS TOO STRESSFUL.
As you can see iMessaging is very helpful.
Please Rate as best,
I hope this helps.
Aster work on soft tissue and produce less waste